K2 KII EMF Meter & GEO Phone K2 KII Speaks for itself. New modle with built in constant on/off switch Used by TAPS on the popular Sy-Fy show. One benefit is the led lights won' flicker for tiny naturally occurring fluctuations of EMF levels. Using structural vibration technology GhoSt Augustine uses this device to detect vibrations in an object or surface without any apparent motion.